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polyfactory SKILL.md skillA

polyfactory from litestar-org/litestar-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add litestar-org/litestar-skills/polyfactory@git:20261104.3c5d082

Pins git:20261104.3c5d082 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: litestar-org/litestar-skills
Path: skills/polyfactory/SKILL.md
Versions recorded: 7
Latest version: git:20261104.3c5d082, committed Nov 4, 2026
First version recorded: Apr 26, 2026
Size: 16,491 bytes
Repository stars: 17
License: MIT

Use when working with polyfactory, ModelFactory, DataclassFactory, MsgspecFactory, AttrsFactory, Use, register_fixture, pytest plugin, __random_seed__, or coverage(). Not for production seeding.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# polyfactory

Polyfactory is a typed mock-data factory library: declare `ModelFactory[T]` (or `DataclassFactory`, `MsgspecFactory`, `AttrsFactory`, `TypedDictFactory`) and `.build()` returns a populated instance of `T`. The matching factory base inspects the model's annotations and supported constraints so tests do not need hand-written happy-path fixtures.

In Litestar projects, polyfactory's pytest plugin is the canonical way to feed `TestClient.post(...)` / `AsyncTestClient.put(...)` payloads. The companion skill `litestar:litestar-testing` covers the request side.

## Code Style Rules

- PEP 604 unions: `T | None`, never `Optional[T]`.
- One factory per model. Don't reuse a factory across unrelated models — clarity beats DRY when the test fails at 3am.
- Pick the right factory base by backend: `ModelFactory` (Pydantic), `DataclassFactory`, `MsgspecFactory`, `AttrsFactory`, `TypedDictFactory`. A mismatched base raises `ConfigurationException`.
- Prefer `register_fixture` over hand-rolled `@pytest.fixture` wrappers. Call it in a pytest-discovered test module or `conftest.py` so the injected fixture is collected.

## Quick Reference

### Picking the right factory base
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add litestar-org/litestar-skills/polyfactory@sha256:4f44f4728fab1e55

The line at the top of this page pins the label git:20261104.3c5d082, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_ilyynljx342mp4as.svg)](https://markdownregistry.com/a/art_ilyynljx342mp4as)

2 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 7 versions of this file, between Apr 26, 2026 and Nov 4, 2026, about one every 32 days.

version	committed	commit	size	audit
git:20261104.3c5d082 latest	2026-11-04	3c5d082	16,491 B	A	view · diff
git:20261004.d2d7b82	2026-10-04	d2d7b82	16,686 B	A	view · diff
git:20260926.70d12b8	2026-09-26	70d12b8	13,980 B	A	view · diff
git:20260723.07bc8a4	2026-07-23	07bc8a4	12,944 B	A	view · diff
git:20260606.cac7da7	2026-06-06	cac7da7	12,694 B	A	view · diff
git:20260427.355b475	2026-04-27	355b475	12,743 B	A	view · diff
git:20260426.22b5485	2026-04-26	22b5485	13,366 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (16491 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag

Source

GitHub

litestar-org/litestar-skills · 17 stars · license MIT · pushed 2026-11-06 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_ilyynljx342mp4as
GET https://markdownregistry.com/api/v1/resolve?ref=litestar-org/litestar-skills/polyfactory
GET https://markdownregistry.com/api/v1/blob/4f44f4728fab1e5581cfc608638f2a4d3d38cd973327869f5ea4d1f3c2a5eab4

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.